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x86: don't allow pseudo-prefixes to be overridden by legacy suffixes

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Deprecated functionality would better not win over its modern
counterparts.
This commit is contained in:
Jan Beulich 2023-11-17 11:23:50 +01:00
parent 3086ed9a45
commit 97f31cb469
1 changed files with 19 additions and 3 deletions
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22
gas/config/tc-i386.c
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@ -5887,16 +5887,32 @@ parse_insn (const char *line, char *mnemonic, bool prefix_only)
Check if we should swap operand or force 32bit displacement in
encoding. */
if (mnem_p - 2 == dot_p && dot_p[1] == 's')
i.dir_encoding = dir_encoding_swap;
{
if (i.dir_encoding == dir_encoding_default)
i.dir_encoding = dir_encoding_swap;
else
as_warn (_("ignoring `.s' suffix due to earlier `{%s}'"),
i.dir_encoding == dir_encoding_load ? "load" : "store");
}
else if (mnem_p - 3 == dot_p
&& dot_p[1] == 'd'
&& dot_p[2] == '8')
i.disp_encoding = disp_encoding_8bit;
{
if (i.disp_encoding == disp_encoding_default)
i.disp_encoding = disp_encoding_8bit;
else if (i.disp_encoding != disp_encoding_8bit)
as_warn (_("ignoring `.d8' suffix due to earlier `{disp<N>}'"));
}
else if (mnem_p - 4 == dot_p
&& dot_p[1] == 'd'
&& dot_p[2] == '3'
&& dot_p[3] == '2')
i.disp_encoding = disp_encoding_32bit;
{
if (i.disp_encoding == disp_encoding_default)
i.disp_encoding = disp_encoding_32bit;
else if (i.disp_encoding != disp_encoding_32bit)
as_warn (_("ignoring `.d32' suffix due to earlier `{disp<N>}'"));
}
else
goto check_suffix;
mnem_p = dot_p;